Under desk drawers cost way more than I think they should, so I bought a basket from dollar tree and converted it into a drawer by 3D printing some simple brackets for it with my goal being to keep the material usage to a minimum.
This is one of the first few things I designed a few years ago when I was new to 3D printing. I've been using it since then.
This is made for 2.25" thick baskets but you can scale it up or down to whatever size you need.
The author marked this model as their own original creation.